Problem with connection to a host using an android device (using Unet)

First of all, thank you for your time.

I'm creating a game that has a multiplayer mode that uses the local wifi network. I am able to create a host and connect two devices. So there's a problem where the game always hangs and closes when it connects to a host ...
I will describe the situation better.

- I use the unity editor to create a host, and I use my cell to connect to the host. When I create the host, the match starts and everything works perfectly. More when my device connects to the host it simply hangs.

- When I create the host on my device and connect to the phone using the editor, everything works perfectly.

- When I use an android device A to create the host, the match starts and everything works perfectly. More when device B connects to the host of device A, device B hangs.

- I'm using Network Manager.

- Below is the script I use to manage the connections:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Networking;
5.  
6. public class GERENCIADORLOCAL : MonoBehaviour {
7.     public static string Nick;
8.     public static bool StartHost;
9.     public static bool StartClient;
10.     public static string IP;
11.     public static int Porta;
12.     public static string Cena;
13.  
14.     private GameObject[] Local;
15.     public int Ping;
16.  
17.     [Header("Elementos")]
18.     [Space(10)]
19.     public NetworkManager GerenciadorLocal;
20.     public GameObject CastielPrefabMultiplayer;
21.  
22.     void Awake()
23.     {
24.         Local = GameObject.FindGameObjectsWithTag("LOCAL");
25.         if (Local.Length >= 2)
26.         {
27.             Destroy(Local[0]);
28.         }
29.         DontDestroyOnLoad(transform.gameObject);
30.     }
31.  
32.     void Start()
33.     {
34.         Nick = DATA.NomeDeUsuario;
35.     }
36.  
37.     void Update()
38.     {
39.         Herois();
40.         Server();
41.     }
42.  
43.     void Herois()
44.     {
45.         if (DATA.HeroiAtivado == ("Castiel"))
46.         {
47.             GerenciadorLocal.playerPrefab = CastielPrefabMultiplayer;
48.         }
49.     }
50.  
51.     void Server()
52.     {
53.         Ping = GerenciadorLocal.simulatedLatency;
54.  
55.         if (Cena == ("Mapa De Teste"))
56.         {
57.             GerenciadorLocal.onlineScene = ("Teste");
58.         }
59.  
60.         if(StartHost == true)
61.         {
62.             GerenciadorLocal.networkAddress = IP;
63.             GerenciadorLocal.networkPort = Porta;
64.             GerenciadorLocal.StartHost();
65.             StartHost = false;
66.         }
67.  
68.         if(StartClient == true)
69.         {
70.             GerenciadorLocal.networkAddress = IP;
71.             GerenciadorLocal.networkPort = Porta;
72.             GerenciadorLocal.StartClient();
73.             StartClient = false;
74.         }
75.     }
76. }

If you can help me, please post a reply here on the topic, I really need some help! If you know of any alternative way to create a local multiplayer, please show me.

I am sorry for my english.
I'm Brazilian.
I searched for answers in my community but found nothing!

Again, thank you for your time!